Brake-band.



J. 0'. GRENSHAW.

BRAKE BAND.

APPLIUATIDN FILED MAY 4, 1909.

966,3 Patented Aug. 2, 1 910.

2 sums-sunny 2.

JOHN CRITY CBENSHAW, F RIVERTON, ALABAMA.

BRAKE-BAND.

Specification 01' Letters Patent. Application filed May 4; 1909.

Patented Aug. 2, 1910.

Serial No. 483,984.

.To all whom 'it may concern:

lie it known that 1, JOHN Curry CREN' SHAW, a citizen of the United States, residing at Rivertomin the county of Colbert and State of Alabama,- have invented certain new and useful Im )rovements in Brake- Bunds, of which the iollowing isa specification.

This invention relates toimprovcments in brake bonds, and particularly to brake bands that substantially surround the brake Wheel or drum, and has for an object the arran ement of means whereby a quicker braking action is secured and a quicker release is provided.

Another object of the invention is the or rangcnicnt of a take-up near the top of the band whereby the band may beadjusted as occasionmay require without removal A further object of the invention is the arrangement of a brake band having friction members loosely mounted upon a carrying rod and having positioned therebetween cushioning members whereby the friction members may upon the release of thebraking lever.

Another object of the invention is the arrangement ofa take-up arranged with means at anydesired point for increasing or decreasing the size of the brake.

With these and other objects inview the invention comprises certain novel constructions, combinations and arrangement of parts as will be hereinafter more fully described and claimed.

- In the accompanying drawings: Figure 1 is a side elevation of an embodiment of the invention shown in' position. Fig. 2 is a .vertical section through the brake shown in= [Fig '1. Fig. 3 is'an edge View of the brake looking directly at the take-up. Fig. 4 is an enlarged detail perspective view of one of i the take-ups. Fig. 5 is an enlarged detail 'p'erspectiveview'of a friction block. 4 F 1g. 6 is an enlarged I of the guards. Fig. 7- is a fragmentary view .1 an adjustable retaining bar and associated arts.

Retie'rring to the drawing, 1 is a base or framework of any desired kind, upon which is mounteda drum 2 of any preferred typb and-which may be driven byany suitable med'hs. d upon the friction wheel 13 of and without inconvenienceto the operator.

be released automatically.

for engaging the friction blocks of the brake I end 17 of each of the detail perspective view of onedrum 2 is a brake embodying the invention. Thebrake is formed with friction blocks 4 of any desired number which are threaded upon bars 5 and 6 which are of less diameter than the apertures passing through block:- 4. Surrounding rod-5 arecushioning block- 7 of soft wood, leather, oran other desirw material, and surrounding r0 6 are cushioning blocks 8 similar to cushioning blocks 7 By the arrangementof the cushioning bloclo- 7 and 8 and the a ertures in the blocks 4 larger thanj-the r s carryin the blocks, e. structure is presented that W1 1 p when lever 9 has been released by rea-' son 'of' the expansion of the: cushioning blocks. Lever 9 is pivotally-mounted at 10 to rod 6, and in turn is pivotally mounted at 11 toba-se or frame 1.,

f Connected with rods "5 and take-up-members 12 and 13 eachof which are formed with turned over portions 14. and 15 having apertures passing therethrough for ucconunodating rods 5 and 6. The turned over portions 14 and'15 may positioned back any desired distance from the ends of rods 5 and 6 so as tom the size of the brake to fit properly the friction wheel 3.- If there is a slight tightening or loosening of the brake desired the ends 14 and 15 are not-adjusted, but the nuts 16 and 133m manipulated result. Each of thejtakeqi members 12- and 13 is provided with an e argement or extension 18 which extends -at substantially a r ht'ungle to the general I ta i 11p. Projecting from'the lug or extension 18 is a threaded member 19 which carries nuts '16 and 17, The threaded exteii:

direction, of the,

release itself 6 isa. pair of take-up members 12. v to secure the desired sion 19 passes throu h In projec g-" p" 7 ward from an, arc s a member 21 which is bent over forlfonnmg shaped member 21 is also forming means for receiving rod '5 whereby the blocks 4 carried by said rodmaybe elamped-by-nut23 against keeper i site are shaped member 21 is a seoon I3 shaped'member 2-5 from which extends or projection 18' .tends member 14. Are shaped members 21 member 15. Arc. bent over at 22 for and 25 are arranged topertl allyinclose ceri tain of the blocks 4 as more clearly shown in Figs. 1, 2- and 3, though if the brake de sired to be extended toits largest exten ex tensions 14 and 15 will be positioned ad acent guards 26 and 27. Guards 26 an l .27 are I i I I it and rod 5 is designed to be Connected to the base or frame 1- by means of an adjustable rod 30 and by uneans of an adjustable cross bar 31. The cross bar 31 is slidingly mounted upon rod 5 and may be adjusted upon rod 30 by nuts '32 and 33. Rod 30 also ma} be adjusted int-elation to base i by means of nuts Set and 35; By the provision of but 30 and the ra'rious adjustments'in connection therewith rod 5 ma' be varioulsl positioned or adjusted around the brake wheel :3, and also rod 6 may be variously .positirmed.

'hat I claim is:

1. The combination with a drum, of a brake therefor eoinprising'a plurality of blocks arranged in groupsoneach side of said drum, a rod passing through each-of said groups. means for spacing said blocks. an adjustable. member connecting .said

groups ofhlm-ksat one end, means for hold-o ing one of said groups of bi'ocks stationary at one end. and means for pulling the rod passing through the other of'said groups for causing all of said blocks to grip said drum.

2. The combinatim With a drum, of a brake therefor comprising a plurality of .blocks formed in groups arranged on oppo site sides of saidadrum, a rod loosely passing through each of said groups 0'1 blocks, resilient means for spacing said blocks, an adjustable member connecting said groups of blocks at one end, means for holding one of said groups of blocks stationary at one end, and means for pullin the rodpassing through the other of sait groups for causing all of said blocks to grip said drum 3. In a brake mechanism a plurality of friction members, cushioning means between the members, means for bringing the same into a gripping position, and a take-up member connecting'said friction members, said take-up member comprising substantially are shaped members adapted to partially surround said friction members, and adjustable means connecting said are shaped members for adjusting the position of the -same and said'friction membersin relation to each. other..

In testimony whereof I aflix my signature r in presence of two witnesses.

JOHN C RI TY CRENSHAWV.

\Vitnesses '\V. M. BUCHAXAN, F. D. THOMPSON. 

